Fujitsu M10-4 Service Manual page 151

Active/hot replacement (for a power supply unit or fan unit)
Active/hot replacement can be performed on a power supply unit and a fan unit.
Perform the following procedure to replace the unit.
Figure 7-2 Active/hot replacement flow (for a power supply unit or fan unit)
1. Open rack door
2. Check operating condition of system
3. Release faulty FRU from system
4. Remove front cover
5. Replace faulty FRU
6. Install front cover
7. Incorporate replacement FRU into system
8. Confirm that there is no problem with
replacement FRU
9. Close rack door
Maintenance complete
Chapter 7 Maintenance Flow 137